What is evaluated during the second and third trimester ultrasound?

During the second and third trimester ultrasound, fetal cardiac activity and placenta location are vital components that are carefully evaluated. The second trimester ultrasound primarily focuses on assessing fetal growth and development, which includes confirming the presence of a heartbeat, evaluating the anatomy of the fetus, and establishing the position of the placenta to ensure it is not located in a position that could pose complications, such as placenta previa.

The assessment of fetal cardiac activity is crucial as it indicates the well-being of the fetus. Additionally, knowing the placenta's location helps guide further management of the pregnancy and plan for delivery if any issues are present.

While amniotic fluid levels and maternal health indicators are also important aspects of prenatal care, the primary focus during the second and third trimester ultrasound specifically includes the assessment of fetal heart activity and the position of the placenta. Therefore, the correct answer highlights the core elements specifically examined during these prenatal ultrasound evaluations.